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avcodec/pngdec: use av_mod_uintp2 

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2016-01-18 18:37:36 -03:00
parent 8514f6dcfd
commit 1bb3b90db8
1 changed files with 1 additions and 1 deletions
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2
libavcodec/pngdec.c
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@ -787,7 +787,7 @@ static int decode_trns_chunk(AVCodecContext *avctx, PNGDecContext *s,
for (i = 0; i < length / 2; i++) { for (i = 0; i < length / 2; i++) {
/* only use the least significant bits */ /* only use the least significant bits */
v = bytestream2_get_be16(&s->gb) & ((1 << s->bit_depth) - 1); v = av_mod_uintp2(bytestream2_get_be16(&s->gb), s->bit_depth);
if (s->bit_depth > 8) if (s->bit_depth > 8)
AV_WB16(&s->transparent_color_be[2 * i], v); AV_WB16(&s->transparent_color_be[2 * i], v);